A Work In Progress!
- the case is done and printed
- the XIAO RP2040 board is in place
- wiring is complete
- Code prototyping is done
- MICROPYTHON coding is ongoing.
This repo is principally about the hardware, code development is ongoing in https://github.com/easytarget/serialOM, released code will be placed here for reference.
See the README in the 'microPython' folder for more.
The case needs care when slicing and printing, some of the clearances are very tight. use a slicer with adaptive layer height features to make sure the screens and PCB's fit correctly.
There is no PCB needed for this, the circuit should be wired + soldered directly in-place (this is fiddly, but possible)
Take care with wiring this, it is important that the 5V supply does not contact the (3v3) TX/RX lines! The connector allows the plug to be reversed to swap TX/RX lines quickly and safely.
(Serial connection loom diagram generated by wireviz from the .yaml description here)
If using an alternate RP2040 board please check the table below to determine which pins the I2C interfaces can be accessed on; and make sure the pins are correctly defined in the code.
I2C0 – SDA : GP0 / GP4 / GP8 / GP12 / GP16 / GP20
I2C0 – SCL : GP1 / GP5 / GP9 / GP13 / GP17 / GP21
I2C1 – SDA : GP2 / GP6 / GP10 / GP14 / GP18 / GP26
I2C1 – SCL : GP3 / GP7 / GP11 / GP15 / GP19 / GP27